Display a confirmation dialogue when the user try to exit the application (Press X button)

Question

I want to modify the default exit procedure in my javafx application to display a confirmation dialogue to the user. The confirmation dialogue will exit the application if the user chooses OK and will keep the application running when user chooses Cancel.

What should I do to make this in javaFX?

Answer 1

primaryStage.addEventFilter(WindowEvent.WINDOW_CLOSE_REQUEST, e->{
    e.consume();
    Popup popup = new Popup();
    HBox buttons = new HBox();
    Button close = new Button("close");
    Button cancel = new Button("cancel");
    buttons.getChildren().addAll(close,cancel);
    buttons.setPadding(new Insets(5,5,5,5));
    popup.getContent().add(buttons);
    popup.show(primaryStage);
    close.setOnAction(ex -> {
        Platform.exit();
    });
    cancel.setOnAction(ec -> {
        popup.hide();
    });
});